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Finding the Fourth Proportional to 397,239.88, 548,188.74 and 225,190.30

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Solution

The fourth proportional to 397,239.88, 548,188.74 and 225,190.30 is: 310,761.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,239.88 : 548,188.74 = 225,190.30 : x
  2. Step 2: Convert to fraction form
    397,239.88/548,188.74 = 225,190.30/x
  3. Step 3: Cross multiply
    397,239.88x = 548,188.74 × 225,190.30
  4. Step 4: Simplify right side
    397,239.88x = 123,446,786,817.22
  5. Step 5: Solve for x
    x = 123,446,786,817.22/397,239.88
  6. Step 6: Final answer
    x = 310,761.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.